Pulverizer.



UNITED @FFEQE.

EDYVA MD A. EVANS AND DAVID TILLEY, Oh COLUMB ()HEO, ASS .iNORS, BYMESNE ASSlUX- MENTS, TO THE JEFFREY MANUFAU'lUliIFJG ('OBIPANY, ACORPORATION OF OHIO.

ruLvEnrzER.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed August 14, 1906. Serial No. 330,61

material of any of numeroussorts is reduced more or less finely by"means of rapidly rotatmg hammer bars which are caused to repeatedlyimpinge upon the material as it passes through the machine.

The present invention relates more particularly to improved devices foreiiectin the adjustment of the hammer bars an. the shaft which carriesthem,

contemplated, sometimes because of wear and sometimes because ofvariations in the materials subjected. to their action.

The object is to maintain for the hammers and their shaft a strongsupport, and at the same time provide for them powerful means formoving, holding and locking them in one position or another, and whichshall, in accomplishing the adjustment, act uniformly upon both ends ofthe shaft and. hammer system.

Figure 1 is a sideelevation of a pulverizing.

gpparatus embodying our improvements.

1g? 2 is a cross section on the line at, a: of Fig. 3. .Fig. 3 is a planview. Fig, 4 is a detailed sectional view of parts of the adjustingmechanism.

. ter are secure In the drawings a pulverizer is shown, but

With respect to many of the details it can be several well known forms,As illusof'anyo trated, it comprises a casing or box G having a feed wayand hopper at H, a set of grate bars I, and a s *stem of hammers J v Thelat- I to and rotated by the shaft K, which extends through the casingor housin G from side to side. This shaft is mounte in strong boxes orbearingaA, one at each end. Each bearing box is formed with a base.plate a which rests upon a table L. i There is one of these supportingtables at each side of the machine, each being situated on linesinclined to the horirion as shown.

The shaft K and the hammers of the system I secured thereto, togetherwith the boxes, are

These hammers frequently require adjustment of the sort shaft E.

held vertically with suf'licient firmness by these inclined tables L.

As above stat-9d, it is frequently desirable to vary the paths throi ighwhich the outer ends of the hammers J travel in. relation to thehorizontal lanes 01 the grate bars I; in some cases it being advantageusto have the 'hnmi'ners travel relatively use to tliebars,

and in others to have them travel at a greater distance therefrom.

To effect the adjustment of the rotary arts various plans have beenheretofore folowed or proposed. Experience with the earlier devices hasled us to designingthe mechanism illustrated in the drawings, in orderthat several \"lisadvantages incident to the earlier apparatus may beovercome.

E indicates a horizontal shalt mounted transversely across the housing.it is supported by brackets or standards M secured to the outer faces ofthe housing-walls.

B, B indicate rods situated at right angles to the shaft E, there beingone of these rods on. each side of the machine. Each rod B is formedwith ears'at its forward end, which are connected by a pivot Z) to oneof the bearing boxes A. Each rod is screw threaded for a greater or lesspart of its length, and to it is fitted an internally threaded wormwheel 0. end of each rod B is supported in a bearing bracket N)rojecting outward from the side face of the housing.

The worm wheel 0 lies under the shaft E, and they are connected by meansof a worm D keyed to the shaft Eand fitting the wheel. There being oneof these worms and its companion worm wheel on each side of the machine,connected to one of the rods B, it will owerful forces can be exertedsimultaneous yl upon the bearing boxes A,

be seen that A, and the latter can vbe uniformly moved upward ordownward along their supporting tables L.

F is a hand wheel secured to theadjusting By means of it, together withthe devices above described, the operator can at any moment instantlyadjust the hammers,

evenwhen they are in rapid rotation, to any position desired.

The worms and worm wheels serve not only to effect the adjustment of thebearing boxes from one position to another, but also act as locks tohold the shaftand hammers in any position to which. they may be moved.

The lower or rear A duplex .ad'ustment and self-locking mechanism of tis sort acting simultaneously and uniformly upon both sides of themachine, is greatly superior to the devices that have been heretoforeused, by which provision was made for the adjusting of each end of thehammer shaft independently of the other, requiring two adjustingoperations, and not giving assurance of absolute unif0rinity in thepositions of the two boxes at the ends of the hammer shaft,respectively.

What We claim is In a pulverizing mechanism of the class described, thecombination of the housiiw, the bottom grate or support for the materiathe shaft, the hammers secured to the shaft, the bearing boxes for thehammer shaft, I

the inclined supports for the boxes, the adjusting shaft mountedtransversely of the housing, the worms on the adjusting shaft one ateither side of the housing, the worm wheels meshing with said Worms, andthe links secured at one end to the bearing boxes and screw-threaded atthe o posite end to engagecorres 'aondi'ng screw-t ireads carried by theworm Wheels, substantially. as set forth.

In testimony whereof We affix our signa-l tures, in presence of twowitnesses.

EDVVARD A. EVANS.

DAVID TILLEY. \Vitnesses r H. S. RANSOM, F. H. CHURCH.

